• Air quality

Wildfire smoke invades DC area with some of the worst air quality on record

Wildfire smoke has pushed DC-area air quality to code purple very unhealthy and hazardous levels, with conditions potentially worsening before improvement arrives.

By Ian Livingston and Jason Samenow

/ Jul 17 2026

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• Capital Weather Live

DC-area forecast: Smoky with unhealthy air into tonight. Storms likely Saturday.

HAPPENING NOW: Smoky air means Code Red (unhealthy) air quality through the evening. Evening temperatures slowly fall through the 80s into the upper 70s. Limit long or intense outdoor activities.

By A. Camden Walker

/ Jul 17 2026

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• Capital Weather Live

🏖️ Weekend beach forecast

Some showers and storms are possible late Saturday afternoon and evening.

By Dan Stillman

/ Jul 16 2026

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• Capital Weather Live

Storm odds build in DC region, peaking Saturday

As heat eases, odds rise for needed rainfall and a few potentially damaging storms, especially Saturday afternoon and evening.

By Ian Livingston

/ Jul 16 2026

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• Capital Weather Live

Wildfire smoke may bring the worst air quality in years to DC on Friday

The same smoke that turned skies orange and sent pollution soaring in the Great Lakes and Northeast is now headed our way.

By Jason Samenow

/ Jul 16 2026

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• Capital Weather Live

DC-area forecast: A little cooler Friday but smokier, then Saturday rain chances

HAPPENING NOW: Steamy and hazy with evening temperatures slowly dipping into the 80s. Lows tonight in the 70s.

By Ian Livingston

/ Jul 16 2026

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• DC Weather, Explained

Why we use dew point instead of relative humidity

If you want to know how humid it will feel outside, pay attention to the dew point — not the relative humidity.

By Jason Samenow

/ Jul 15 2026

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• Capital Weather Live

What permanent daylight saving time would mean for DC

The House passed the Sunshine Protection Act on Tuesday. Is this the time daylight saving time becomes permanent year-round?

By Ian Livingston and Dan Stillman

/ Jul 15 2026

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• Capital Weather Live

Canadian wildfire smoke has arrived in DC yet again, and could get worse

Smoke from Canadian wildfires could bring hazier skies, vivid sunsets and declining air quality to the DC area later this week.

By Jason Samenow

/ Jul 15 2026

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• Capital Weather Live

DC-area forecast: Sizzling heat again tomorrow, with a smoky haze at times

HAPPENING NOW: Slowly falling back into the 80s this evening. Muggy through the night with lows in the mid-70s to near 80.

By Dan Stillman

/ Jul 15 2026

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• Capital Weather Live

How to stay safe in the heat

A heat advisory is in effect for the DC area Thursday until 8 p.m.

By Dan Stillman

/ Jul 14 2026

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